(under subclass 608) Device wherein means are provided either (a) to engage a wall or edge on or adjacent to the surface over which the device moves to guide the same over the surface, or (b) to mark a line or point on the surface to serve as a visual aid for an operative in guiding the device over the surface.
(1) Note. The guide line marker must be in addition to a primary dispensing means, e.g., a lime dispenser, per se, for making grid lines on an athletic field would be excluded under this definition, even though the lines themselves would serve as a guide to the operative.
(2) Note. Devices having a grooved or flanged wheel adapted
to travel on a rail or track will be found herein.
